EnviroMetal Technologies (CSE:ETI, OTCQB:EVLLF) Inc has announced test data demonstrating an additional economic benefit of on-site gold recovery using the company’s patented, cyanide-free gold recovery process.
In recent bulk tests of the company’s process, gold grades calculated using gold recovered and residual gold values in post-processing material were compared to gold grades estimated using industry-standard assay protocols employed by smelters for determining gold payments.
Notably, gold recovered was 58 grams more than the gold purchased in the 1,671-kilogram sample, and final calculated gold graded at 485 grams per tonne compared to an assayed grade of 450 grams per tonne for the 1,671-kilogram sample. That’s an increase of 35 grams per tonne, or roughly US$2,100.
In a 620-kilogram sub-sample, the final calculated gold grade was 480 g/t compared to an assayed grade of 437 g/t. That’s 43 grams per tonne gold higher, or about US$2,550.
The assay comparisons expose a negative bias in grade estimation practices used for calculating concentrate value and provide further incentive for concentrate producers to eliminate or reduce their reliance on smelters by adopting the EnviroMetal Process for on-site gold recovery, the company said.
"Our findings highlight the risk miners face when relying on assays to determine the amount of gold in concentrates sold to smelters particularly when the concentrates are high grade or contain large gold particles or ‘nuggets,’” CEO Wayne Moorhouse said in a statement.
“Our data confirms the suspicions of concentrate producers and we are proud to offer a solution that helps miners maximize value. The EnviroMetal process can be incorporated in new or existing processing plants allowing miners to reduce assay risk and get paid for more gold."
Contact Andrew Kessel at andrew.kessel@proactiveinvestors.com
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